1121231221010 has 16 divisors (see below), whose sum is σ = 2018519671896. Its totient is φ = 448425049728.

The previous prime is 1121231220973. The next prime is 1121231221043. The reversal of 1121231221010 is 101221321211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 942955581481 + 178275639529 = 971059^2 + 422227^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1121231221010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8359979 + ... + 8493038.

Almost surely, 2^{1121231221010} is an apocalyptic number.

1121231221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121231221010 is a deficient number, since it is larger than the sum of its proper divisors (897288450886).

1121231221010 is a wasteful number, since it uses less digits than its factorization.

1121231221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16859677.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1121231221010 its reverse (101221321211), we get a palindrome (1222452542221).

The spelling of 1121231221010 in words is "one trillion, one hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-one thousand, ten".