231221031201030 has 64 divisors (see below), whose sum is σ = 597619711055808. Its totient is φ = 56915729326080.

The previous prime is 231221031201023. The next prime is 231221031201067. The reversal of 231221031201030 is 30102130122132.

It is a junction number, because it is equal to n+sod(n) for n = 231221031200988 and 231221031201006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117276990 + ... + 119232270.

It is an arithmetic number, because the mean of its divisors is an integer number (9337807985247).

Almost surely, 2^{231221031201030} is an apocalyptic number.

231221031201030 is an abundant number, since it is smaller than the sum of its proper divisors (366398679854778).

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

231221031201030 is a wasteful number, since it uses less digits than its factorization.

231221031201030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258521.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231221031201030 its reverse (30102130122132), we get a palindrome (261323161323162).

The spelling of 231221031201030 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, thirty-one million, two hundred one thousand, thirty".