10020021221111 has 4 divisors (see below), whose sum is σ = 10930932241224. Its totient is φ = 9109110201000.

The previous prime is 10020021221099. The next prime is 10020021221117. The reversal of 10020021221111 is 11112212002001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10020021221111 - 2¹⁸ = 10020020958967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020021221117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455455510040 + ... + 455455510061.

It is an arithmetic number, because the mean of its divisors is an integer number (2732733060306).

Almost surely, 2^{10020021221111} is an apocalyptic number.

10020021221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10020021221111 is a deficient number, since it is larger than the sum of its proper divisors (910911020113).

10020021221111 is an equidigital number, since it uses as much as digits as its factorization.

10020021221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910911020112.

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

Adding to 10020021221111 its reverse (11112212002001), we get a palindrome (21132233223112).

The spelling of 10020021221111 in words is "ten trillion, twenty billion, twenty-one million, two hundred twenty-one thousand, one hundred eleven".