1221522050 has 96 divisors (see below), whose sum is σ = 2707326720. Its totient is φ = 401184000.

The previous prime is 1221522037. The next prime is 1221522053. The reversal of 1221522050 is 502251221.

It is a happy number.

It is a super-2 number, since 2×1221522050² = 2984232237272405000, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221522053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1532252 + ... + 1533048.

It is an arithmetic number, because the mean of its divisors is an integer number (28201320).

Almost surely, 2^1221522050 is an apocalyptic number.

1221522050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221522050 is an abundant number, since it is smaller than the sum of its proper divisors (1485804670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221522050 is a wasteful number, since it uses less digits than its factorization.

1221522050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996 (or 991 counting only the distinct ones).

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

The square root of 1221522050 is about 34950.2796841456. The cubic root of 1221522050 is about 1068.9739049595.

Adding to 1221522050 its reverse (502251221), we get a palindrome (1723773271).

The spelling of 1221522050 in words is "one billion, two hundred twenty-one million, five hundred twenty-two thousand, fifty".