1220121012231 has 24 divisors (see below), whose sum is σ = 1927315762320. Its totient is φ = 737659267200.

The previous prime is 1220121012217. The next prime is 1220121012281. The reversal of 1220121012231 is 1322101210221.

1220121012231 is a `hidden beast` number, since 1 + 220 + 1 + 210 + 1 + 2 + 231 = 666.

It is not a de Polignac number, because 1220121012231 - 2¹¹ = 1220121010183 is a prime.

It is a super-2 number, since 2×1220121012231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220121012281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15026080 + ... + 15107061.

It is an arithmetic number, because the mean of its divisors is an integer number (80304823430).

Almost surely, 2^{1220121012231} is an apocalyptic number.

1220121012231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220121012231 is a deficient number, since it is larger than the sum of its proper divisors (707194750089).

1220121012231 is a wasteful number, since it uses less digits than its factorization.

1220121012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30133567 (or 30133564 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1220121012231 its reverse (1322101210221), we get a palindrome (2542222222452).

The spelling of 1220121012231 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, twelve thousand, two hundred thirty-one".