1220990231 has 8 divisors (see below), whose sum is σ = 1230349824. Its totient is φ = 1211657440.

The previous prime is 1220990227. The next prime is 1220990237. The reversal of 1220990231 is 1320990221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220990231 - 2² = 1220990227 is a prime.

It is a super-2 number, since 2×1220990231² = 2981634288394866722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220990194 and 1220990203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220990237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90026 + ... + 102696.

It is an arithmetic number, because the mean of its divisors is an integer number (153793728).

Almost surely, 2^1220990231 is an apocalyptic number.

1220990231 is a deficient number, since it is larger than the sum of its proper divisors (9359593).

1220990231 is a wasteful number, since it uses less digits than its factorization.

1220990231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1220990231 is about 34942.6706334819. The cubic root of 1220990231 is about 1068.8187479413.

It can be divided in two parts, 1220990 and 231, that added together give a palindrome (1221221).

The spelling of 1220990231 in words is "one billion, two hundred twenty million, nine hundred ninety thousand, two hundred thirty-one".