10101211010021 has 16 divisors (see below), whose sum is σ = 10124600563200. Its totient is φ = 10077861337200.

The previous prime is 10101211009987. The next prime is 10101211010047. The reversal of 10101211010021 is 12001011210101.

It is a cyclic number.

It is not a de Polignac number, because 10101211010021 - 2²⁶ = 10101143901157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10101211009984 and 10101211010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101211010081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3619207136 + ... + 3619209926.

It is an arithmetic number, because the mean of its divisors is an integer number (632787535200).

Almost surely, 2^{10101211010021} is an apocalyptic number.

It is an amenable number.

10101211010021 is a deficient number, since it is larger than the sum of its proper divisors (23389553179).

10101211010021 is a wasteful number, since it uses less digits than its factorization.

10101211010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10101211010021 its reverse (12001011210101), we get a palindrome (22102222220122).

The spelling of 10101211010021 in words is "ten trillion, one hundred one billion, two hundred eleven million, ten thousand, twenty-one".