250220501021 has 16 divisors (see below), whose sum is σ = 255185946624. Its totient is φ = 245317572864.

The previous prime is 250220500979. The next prime is 250220501023. The reversal of 250220501021 is 120105022052.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250220501021 is a prime.

It is a super-2 number, since 2×250220501021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 250220500984 and 250220501002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250220501023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3924620 + ... + 3987866.

It is an arithmetic number, because the mean of its divisors is an integer number (15949121664).

Almost surely, 2^250220501021 is an apocalyptic number.

It is an amenable number.

250220501021 is a deficient number, since it is larger than the sum of its proper divisors (4965445603).

250220501021 is a wasteful number, since it uses less digits than its factorization.

250220501021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63740.

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 250220501021 its reverse (120105022052), we get a palindrome (370325523073).

The spelling of 250220501021 in words is "two hundred fifty billion, two hundred twenty million, five hundred one thousand, twenty-one".