402021110000121 has 4 divisors (see below), whose sum is σ = 536028146666832. Its totient is φ = 268014073333412.

The previous prime is 402021110000119. The next prime is 402021110000123. The reversal of 402021110000121 is 121000011120204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (402021110000119) and next prime (402021110000123).

It is a cyclic number.

It is not a de Polignac number, because 402021110000121 - 2¹ = 402021110000119 is a prime.

It is a super-4 number, since 4×402021110000121⁴ (a number of 60 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402021110000121.

It is not an unprimeable number, because it can be changed into a prime (402021110000123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67003518333351 + ... + 67003518333356.

It is an arithmetic number, because the mean of its divisors is an integer number (134007036666708).

Almost surely, 2^{402021110000121} is an apocalyptic number.

It is an amenable number.

402021110000121 is a deficient number, since it is larger than the sum of its proper divisors (134007036666711).

402021110000121 is a wasteful number, since it uses less digits than its factorization.

402021110000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134007036666710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 402021110000121 its reverse (121000011120204), we get a palindrome (523021121120325).

The spelling of 402021110000121 in words is "four hundred two trillion, twenty-one billion, one hundred ten million, one hundred twenty-one", and thus it is an aban number.