20220021151 has 4 divisors (see below), whose sum is σ = 22058204904. Its totient is φ = 18381837400.

The previous prime is 20220021139. The next prime is 20220021167. The reversal of 20220021151 is 15112002202.

It is a happy number.

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 20220021151 - 2²⁵ = 20186466719 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 (20220021551) 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, 919091860 + ... + 919091881.

It is an arithmetic number, because the mean of its divisors is an integer number (5514551226).

Almost surely, 2^20220021151 is an apocalyptic number.

20220021151 is a deficient number, since it is larger than the sum of its proper divisors (1838183753).

20220021151 is a wasteful number, since it uses less digits than its factorization.

20220021151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838183752.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20220021151 its reverse (15112002202), we get a palindrome (35332023353).

The spelling of 20220021151 in words is "twenty billion, two hundred twenty million, twenty-one thousand, one hundred fifty-one".