21011120221010 has 16 divisors (see below), whose sum is σ = 37821810130200. Its totient is φ = 8404049481216.

The previous prime is 21011120220989. The next prime is 21011120221031. The reversal of 21011120221010 is 1012202111012.

It is an interprime number because it is at equal distance from previous prime (21011120220989) and next prime (21011120221031).

It can be written as a sum of positive squares in 4 ways, for example, as 19823144477761 + 1187975743249 = 4452319^2 + 1089943^2 .

It is a super-2 number, since 2×21011120221010² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49604465 + ... + 50026244.

Almost surely, 2^{21011120221010} is an apocalyptic number.

21011120221010 is a deficient number, since it is larger than the sum of its proper divisors (16810689909190).

21011120221010 is a wasteful number, since it uses less digits than its factorization.

21011120221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99651805.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21011120221010 its reverse (1012202111012), we get a palindrome (22023322332022).

It can be divided in two parts, 21011 and 120221010, that added together give a palindrome (120242021).

The spelling of 21011120221010 in words is "twenty-one trillion, eleven billion, one hundred twenty million, two hundred twenty-one thousand, ten".