120121001101021 has 8 divisors (see below), whose sum is σ = 123348859679864. Its totient is φ = 116933744517120.

The previous prime is 120121001100983. The next prime is 120121001101039. The reversal of 120121001101021 is 120101100121021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10846154222500 + 109274846878521 = 3293350^2 + 10453461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120121001101021 is a prime.

It is a super-2 number, since 2×120121001101021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120121001100992 and 120121001101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121001101121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10150492740 + ... + 10150504573.

It is an arithmetic number, because the mean of its divisors is an integer number (15418607459983).

Almost surely, 2^{120121001101021} is an apocalyptic number.

It is an amenable number.

120121001101021 is a deficient number, since it is larger than the sum of its proper divisors (3227858578843).

120121001101021 is an equidigital number, since it uses as much as digits as its factorization.

120121001101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20300997471.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 120121001101021 its reverse (120101100121021), we get a palindrome (240222101222042).

The spelling of 120121001101021 in words is "one hundred twenty trillion, one hundred twenty-one billion, one million, one hundred one thousand, twenty-one".