121401012 has 48 divisors (see below), whose sum is σ = 300888000. Its totient is φ = 37965312.

The previous prime is 121401011. The next prime is 121401017. The reversal of 121401012 is 210104121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121401011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80239 + ... + 81737.

It is an arithmetic number, because the mean of its divisors is an integer number (6268500).

Almost surely, 2^121401012 is an apocalyptic number.

121401012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121401012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150444000).

121401012 is an abundant number, since it is smaller than the sum of its proper divisors (179486988).

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

121401012 is a wasteful number, since it uses less digits than its factorization.

121401012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121401012 is about 11018.2127407307. The cubic root of 121401012 is about 495.1545441332.

Adding to 121401012 its reverse (210104121), we get a palindrome (331505133).

The spelling of 121401012 in words is "one hundred twenty-one million, four hundred one thousand, twelve".