2121202103021 has 8 divisors (see below), whose sum is σ = 2189733120000. Its totient is φ = 2052677657520.

The previous prime is 2121202103011. The next prime is 2121202103023. The reversal of 2121202103021 is 1203012021212.

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-2121202103021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121202103023) 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, 982646 + ... + 2282103.

It is an arithmetic number, because the mean of its divisors is an integer number (273716640000).

Almost surely, 2^{2121202103021} is an apocalyptic number.

It is an amenable number.

2121202103021 is a deficient number, since it is larger than the sum of its proper divisors (68531016979).

2121202103021 is a wasteful number, since it uses less digits than its factorization.

2121202103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285739.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2121202103021 its reverse (1203012021212), we get a palindrome (3324214124233).

The spelling of 2121202103021 in words is "two trillion, one hundred twenty-one billion, two hundred two million, one hundred three thousand, twenty-one".