101221560840 has 64 divisors (see below), whose sum is σ = 313460328960. Its totient is φ = 26121692160.

The previous prime is 101221560829. The next prime is 101221560851. The reversal of 101221560840 is 48065122101.

It is an interprime number because it is at equal distance from previous prime (101221560829) and next prime (101221560851).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 101221560798 and 101221560807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13601329 + ... + 13608768.

It is an arithmetic number, because the mean of its divisors is an integer number (4897817640).

Almost surely, 2^101221560840 is an apocalyptic number.

101221560840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221560840 is an abundant number, since it is smaller than the sum of its proper divisors (212238768120).

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

101221560840 is a wasteful number, since it uses less digits than its factorization.

101221560840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27210142 (or 27210138 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 101221560840 its reverse (48065122101), we get a palindrome (149286682941).

The spelling of 101221560840 in words is "one hundred one billion, two hundred twenty-one million, five hundred sixty thousand, eight hundred forty".