101221111011010 has 16 divisors (see below), whose sum is σ = 182277458212536. Its totient is φ = 40470786983808.

The previous prime is 101221111010923. The next prime is 101221111011043. The reversal of 101221111011010 is 10110111122101.

It can be written as a sum of positive squares in 4 ways, for example, as 73527383685721 + 27693727325289 = 8574811^2 + 5262483^2 .

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, 2207153499 + ... + 2207199358.

Almost surely, 2^{101221111011010} is an apocalyptic number.

101221111011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101221111011010 is a deficient number, since it is larger than the sum of its proper divisors (81056347201526).

101221111011010 is a wasteful number, since it uses less digits than its factorization.

101221111011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414355157.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 101221111011010 its reverse (10110111122101), we get a palindrome (111331222133111).

The spelling of 101221111011010 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred eleven million, eleven thousand, ten".