21021101201010 has 64 divisors (see below), whose sum is σ = 51279157923840. Its totient is φ = 5513574977280.

The previous prime is 21021101200993. The next prime is 21021101201021. The reversal of 21021101201010 is 1010210112012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73402959 + ... + 73688781.

It is an arithmetic number, because the mean of its divisors is an integer number (801236842560).

Almost surely, 2^{21021101201010} is an apocalyptic number.

21021101201010 is an abundant number, since it is smaller than the sum of its proper divisors (30258056722830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021101201010 is a wasteful number, since it uses less digits than its factorization.

21021101201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326083.

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

Adding to 21021101201010 its reverse (1010210112012), we get a palindrome (22031311313022).

The spelling of 21021101201010 in words is "twenty-one trillion, twenty-one billion, one hundred one million, two hundred one thousand, ten".