2101212102021 has 8 divisors (see below), whose sum is σ = 2817094678944. Its totient is φ = 1393068796560.

The previous prime is 2101212102007. The next prime is 2101212102037. The reversal of 2101212102021 is 1202012121012.

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

It is not a de Polignac number, because 2101212102021 - 2³³ = 2092622167429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101212102061) 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, 1934817231 + ... + 1934818316.

It is an arithmetic number, because the mean of its divisors is an integer number (352136834868).

Almost surely, 2^{2101212102021} is an apocalyptic number.

It is an amenable number.

2101212102021 is a deficient number, since it is larger than the sum of its proper divisors (715882576923).

2101212102021 is a wasteful number, since it uses less digits than its factorization.

2101212102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869635731.

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

Adding to 2101212102021 its reverse (1202012121012), we get a palindrome (3303224223033).

The spelling of 2101212102021 in words is "two trillion, one hundred one billion, two hundred twelve million, one hundred two thousand, twenty-one".