2101202121021 has 8 divisors (see below), whose sum is σ = 2811164613600. Its totient is φ = 1396020521232.

The previous prime is 2101202121019. The next prime is 2101202121047. The reversal of 2101202121021 is 1201212021012.

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

It is not a de Polignac number, because 2101202121021 - 2¹ = 2101202121019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101202125021) 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, 1195222171 + ... + 1195223928.

It is an arithmetic number, because the mean of its divisors is an integer number (351395576700).

Almost surely, 2^{2101202121021} is an apocalyptic number.

It is an amenable number.

2101202121021 is a deficient number, since it is larger than the sum of its proper divisors (709962492579).

2101202121021 is a wasteful number, since it uses less digits than its factorization.

2101202121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390446395.

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

Adding to 2101202121021 its reverse (1201212021012), we get a palindrome (3302414142033).

The spelling of 2101202121021 in words is "two trillion, one hundred one billion, two hundred two million, one hundred twenty-one thousand, twenty-one".