20211021010 has 32 divisors (see below), whose sum is σ = 36949534272. Its totient is φ = 7957984320.

The previous prime is 20211020969. The next prime is 20211021043. The reversal of 20211021010 is 1012011202.

It is a super-2 number, since 2×20211021010² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 983440 + ... + 1003780.

It is an arithmetic number, because the mean of its divisors is an integer number (1154672946).

Almost surely, 2^20211021010 is an apocalyptic number.

20211021010 is a deficient number, since it is larger than the sum of its proper divisors (16738513262).

20211021010 is a wasteful number, since it uses less digits than its factorization.

20211021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21898.

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

Adding to 20211021010 its reverse (1012011202), we get a palindrome (21223032212).

The spelling of 20211021010 in words is "twenty billion, two hundred eleven million, twenty-one thousand, ten".