210100012101021 has 64 divisors (see below), whose sum is σ = 351080139091968. Its totient is φ = 109135108228608.

The previous prime is 210100012101019. The next prime is 210100012101139. The reversal of 210100012101021 is 120101210001012.

It is not a de Polignac number, because 210100012101021 - 2¹ = 210100012101019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210100012100988 and 210100012101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100012141021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 135934776 + ... + 137471681.

It is an arithmetic number, because the mean of its divisors is an integer number (5485627173312).

Almost surely, 2^{210100012101021} is an apocalyptic number.

210100012101021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210100012101021 is a deficient number, since it is larger than the sum of its proper divisors (140980126990947).

210100012101021 is a wasteful number, since it uses less digits than its factorization.

210100012101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273406570.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210100012101021 its reverse (120101210001012), we get a palindrome (330201222102033).

The spelling of 210100012101021 in words is "two hundred ten trillion, one hundred billion, twelve million, one hundred one thousand, twenty-one".