21101003012 has 6 divisors (see below), whose sum is σ = 36926755278. Its totient is φ = 10550501504.

The previous prime is 21101002877. The next prime is 21101003039. The reversal of 21101003012 is 21030010112.

It can be written as a sum of positive squares in only one way, i.e., 20953720516 + 147282496 = 144754^2 + 12136^2 .

It is a super-2 number, since 2×21101003012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101002984 and 21101003002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2637625373 + ... + 2637625380.

It is an arithmetic number, because the mean of its divisors is an integer number (6154459213).

Almost surely, 2^21101003012 is an apocalyptic number.

It is an amenable number.

21101003012 is a deficient number, since it is larger than the sum of its proper divisors (15825752266).

21101003012 is a wasteful number, since it uses less digits than its factorization.

21101003012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275250757 (or 5275250755 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21101003012 its reverse (21030010112), we get a palindrome (42131013124).

It can be divided in two parts, 2110100 and 3012, that added together give a palindrome (2113112).

The spelling of 21101003012 in words is "twenty-one billion, one hundred one million, three thousand, twelve".