21020101020010 has 64 divisors (see below), whose sum is σ = 38236582137600. Its totient is φ = 8319528783360.

The previous prime is 21020101019969. The next prime is 21020101020029. The reversal of 21020101020010 is 1002010102012.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 837541782 + ... + 837566878.

It is an arithmetic number, because the mean of its divisors is an integer number (597446595900).

Almost surely, 2^{21020101020010} is an apocalyptic number.

21020101020010 is a deficient number, since it is larger than the sum of its proper divisors (17216481117590).

21020101020010 is a wasteful number, since it uses less digits than its factorization.

21020101020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27391.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21020101020010 its reverse (1002010102012), we get a palindrome (22022111122022).

The spelling of 21020101020010 in words is "twenty-one trillion, twenty billion, one hundred one million, twenty thousand, ten".