21305101421046 has 16 divisors (see below), whose sum is σ = 42610249289664. Its totient is φ = 7101692732424.

The previous prime is 21305101420997. The next prime is 21305101421069. The reversal of 21305101421046 is 64012410150312.

It is a super-2 number, since 2×21305101421046² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 7776901 + ... + 10153343.

It is an arithmetic number, because the mean of its divisors is an integer number (2663140580604).

Almost surely, 2^{21305101421046} is an apocalyptic number.

21305101421046 is an abundant number, since it is smaller than the sum of its proper divisors (21305147868618).

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

21305101421046 is a wasteful number, since it uses less digits than its factorization.

21305101421046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870635.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21305101421046 its reverse (64012410150312), we get a palindrome (85317511571358).

The spelling of 21305101421046 in words is "twenty-one trillion, three hundred five billion, one hundred one million, four hundred twenty-one thousand, forty-six".