1221122100010 has 16 divisors (see below), whose sum is σ = 2200584579336. Its totient is φ = 487878884608.

The previous prime is 1221122099929. The next prime is 1221122100049. The reversal of 1221122100010 is 100012211221.

It can be written as a sum of positive squares in 4 ways, for example, as 1217498180409 + 3623919601 = 1103403^2 + 60199^2 .

It is a super-2 number, since 2×1221122100010² (a number of 25 digits) contains 22 as substring.

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, 71235427 + ... + 71252566.

Almost surely, 2^{1221122100010} is an apocalyptic number.

1221122100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221122100010 is a deficient number, since it is larger than the sum of its proper divisors (979462479326).

1221122100010 is a wasteful number, since it uses less digits than its factorization.

1221122100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142488857.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221122100010 its reverse (100012211221), we get a palindrome (1321134311231).

The spelling of 1221122100010 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, ten".